$\begin{array} { l }{x}^{2}=0,\\{x}^{3}-3=0\end{array}$
Solve the equation for $x$$\begin{array} { l }x=0,\\{x}^{3}-3=0\end{array}$
Solve the equation for $x$$\begin{array} { l }x=0,\\x=\sqrt[3]{3}\end{array}$
The equation has $2$ solutions$\begin{align*}&\begin{array} { l }x_1=0,& x_2=\sqrt[3]{3}\end{array} \\&\begin{array} { l }x_1=0,& x_2\approx1.44225\end{array}\end{align*}$